Planet Earth, our celestial home, has captivated human curiosity for centuries. From the mysteries of its rocky surface to the intricate web of life that thrives upon it, our planet is a testament to the wonders of the natural world. The study of Earth, its geology, and its interconnected ecosystems has given rise to a rich tapestry of knowledge that spans multiple scientific disciplines.

In this age of exploration and discovery, where the boundaries of human knowledge are continually pushed outward, there is an ever-growing thirst for a comprehensive understanding of the planet we call home. This thirst extends not only to the Earth itself but also to the vast expanse of the cosmos beyond.

It is within this spirit of exploration and understanding that we present to you the "Dictionary of Planetary Geology and added Geobiology." This ambitious reference work is designed to be your compass through the intricate terrain of planetary science, offering insights into the geological processes that have shaped Earth and other celestial bodies, the biology that has flourished in diverse environments, and the interconnectedness of our planet with the broader cosmos.

This dictionary is more than just a compilation of words and their meanings; it is a gateway to a world of knowledge. Whether you are a seasoned scientist, a student embarking on your educational journey, or simply a curious individual with an interest in the wonders of the natural world, you will find within these pages a wealth of information that will deepen your understanding of Earth's geology, the geology of other planets and moons, and the intricate web of life that weaves its way through our planet's history.

The entries in this dictionary have been carefully curated to encompass a wide range of topics, from the basics of geological processes to the most recent discoveries in planetary science and geobiology. We have drawn upon the expertise of leading scientists and researchers from around the world to provide accurate and up-to-date information.

As you embark on your journey through the pages of this dictionary, we invite you to marvel at the breathtaking beauty of our planet, to ponder the mysteries of the cosmos, and to appreciate the extraordinary diversity of life that Earth sustains. We hope that this book will not only serve as a valuable reference but also inspire you to explore the wonders of our planet and the universe beyond.

Thank you for joining us on this exploration of Earth's geology, geobiology, and the fascinating landscapes of other celestial bodies. May this dictionary be your guide as you embark on your own journey of discovery.

With curiosity and wonder,

Yamini Malhotra

SR Singarasubramanian